They might not choose the date of the death of John Lennon to see as a date of loss and mourning, they would be more likely to remember the date the Ringling Brothers died or the day the woman from Born Free was born.
For participants who were event-free, follow-up time was censored at February 28 , 2009or on the date of loss to follow up, whichever occurred earlier.
Person-years of follow-up for each cohort member were counted from the date of one year after recruitment to the date of NPC diagnosis, date of death or emigration, date of loss for follow-up, or December 31 , 2007 whichever occurred first.
Patients were followed up until death, or date of loss to follow-up, or 31 December 1995 (closing date).
Men will be censored on the date of death, or date of loss to follow-up (e.g., notified by the HSCIC as having emigrated).
The analysis was per protocol; any child who repatriated or became lost to follow-up was only included up to the date of loss or repatriation.
Ten patients (6.9%) were lost to follow-up and their data were included in the DFS analysis until the date of loss.
The primary outcome variable, survival time of breast cancer patients, was calculated from date of diagnosis to date of death, date of loss to follow-up, or date of study end (December 31 , 2011.
We censored patients at the date of the occurrence of the first hypertension related outcome, date of death, date of loss to follow-up (for example, relocation), or end of study period.
Duration of follow-up was defined as the period between the date of study inclusion and the date of incident type 2 diabetes, date of loss to follow-up or the preselected closing date of 1 March 2010.
